Major restructuring of the internals of SILC Cipher API

[crypto.git] / lib / silccrypt / cast.h

diff --git a/lib/silccrypt/cast.h b/lib/silccrypt/cast.h
index a83c06e5a9d9399b684c63dec175f3756f10c74d..8a06bfad58a687d9ad7c330dd48ec556f0910224 100644 (file)
--- a/lib/silccrypt/cast.h
+++ b/lib/silccrypt/cast.h
@@ -2,148 +2,33 @@
 
   cast.h
 
-  Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
+  Author: Pekka Riikonen <priikone@silcnet.org>
 
-  Copyright (C) 1999 - 2000 Pekka Riikonen
+  Copyright (C) 1999 - 2008 Pekka Riikonen
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
-  the Free Software Foundation; either version 2 of the License, or
-  (at your option) any later version.
-  
+  the Free Software Foundation; version 2 of the License.
+
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
 
 */
-/*
- * $Id$
- * $Log$
- * Revision 1.1.1.1  2000/06/27 11:36:54  priikone
- *     Importet from internal CVS/Added Log headers.
- *
- *
- */
 
 #ifndef CAST_H
 #define CAST_H
 
-#include "cast_internal.h"
-
-/* 
- * SILC Crypto API for Cast
+/*
+ * SILC Crypto API for Cast-256
  */
 
-/* Sets the key for the cipher. */
-
-inline int silc_cast_init(void *context, 
-                         const unsigned char *key, 
-                         unsigned int keylen)
-{
-  cast_set_key((CastContext *)context, (unsigned int *)key, keylen);
-  return 1;
-}
-
-/* Sets the string as a new key for the cipher. The string is first
-   hashed and then used as a new key. */
-
-inline int silc_cast_set_string_as_key(void *context, 
-                                      const unsigned char *string,
-                                      unsigned int stringlen)
-{
-  /*  SilcHash hash;
-  unsigned char key[16];
-
-  silc_hash_alloc("md5", &hash);
-  hash->make_hash(hash, string, stringlen, key);
-
-  cast_set_key((CastContext *)context, (const u4byte *)key, sizeof(key));
-
-  silc_hash_free(hash);
-  memset(&key, 'F', sizeof(key));
-  */
-  return TRUE;
-}
-
-/* Returns the size of the cipher context. */
-
-inline unsigned int silc_cast_context_len()
-{
-  return sizeof(CastContext);
-}
-
-/* Encrypts with the cipher in CBC mode. */
-
-inline int silc_cast_encrypt_cbc(void *context,
-                                const unsigned char *src,
-                                unsigned char *dst,
-                                unsigned int len,
-                                unsigned char *iv)
-{
-  unsigned int *in, *out, *tiv;
-  unsigned int tmp[4];
-  int i;
-
-  in = (unsigned int *)src;
-  out = (unsigned int *)dst;
-  tiv = (unsigned int *)iv;
-
-  tmp[0] = in[0] ^ tiv[0];
-  tmp[1] = in[1] ^ tiv[1];
-  tmp[2] = in[2] ^ tiv[2];
-  tmp[3] = in[3] ^ tiv[3];
-  cast_encrypt((CastContext *)context, tmp, out);
-  in += 4;
-  out += 4;
-
-  for (i = 16; i < len; i += 16) {
-    tmp[0] = in[0] ^ out[0 - 4];
-    tmp[1] = in[1] ^ out[1 - 4];
-    tmp[2] = in[2] ^ out[2 - 4];
-    tmp[3] = in[3] ^ out[3 - 4];
-    cast_encrypt((CastContext *)context, tmp, out);
-    in += 4;
-    out += 4;
-  }
-
-  return 1;
-}
-
-/* Decrypts with the cipher in CBC mode. */
-
-inline int silc_cast_decrypt_cbc(void *context,
-                                const unsigned char *src,
-                                unsigned char *dst,
-                                unsigned int len,
-                                unsigned char *iv)
-{
-  unsigned int *in, *out, *tiv;
-  int i;
-
-  in = (unsigned int *)src;
-  out = (unsigned int *)dst;
-  tiv = (unsigned int *)iv;
-
-  cast_decrypt((CastContext *)context, in, out);
-  out[0] ^= tiv[0];
-  out[1] ^= tiv[1];
-  out[2] ^= tiv[2];
-  out[3] ^= tiv[3];
-  in += 4;
-  out += 4;
-
-  for (i = 16; i < len; i += 16) {
-    cast_decrypt((CastContext *)context, in, out);
-    out[0] ^= in[0 - 4];
-    out[1] ^= in[1 - 4];
-    out[2] ^= in[2 - 4];
-    out[3] ^= in[3 - 4];
-    in += 4;
-    out += 4;
-  }
-
-  return 1;
-}
+SILC_CIPHER_API_SET_KEY(cast_cbc);
+SILC_CIPHER_API_SET_IV(cast_cbc);
+SILC_CIPHER_API_INIT(cast_cbc);
+SILC_CIPHER_API_UNINIT(cast_cbc);
+SILC_CIPHER_API_ENCRYPT(cast_cbc);
+SILC_CIPHER_API_DECRYPT(cast_cbc);
 
 #endif